Mind the gap

These huge, amazing optical illusions by German artist Edgar Mueller were created as a part of a 30th anniversary of a street painting competition held in Germany every summer. Read more about the crevasse and other works of Mueller here.

He spent five days, working 12 hours a day, to create the 250 square metre image of the crevasse, which, viewed from the correct angle, appears to be 3D. He then persuaded passers-by to complete the illusion by pretending the gaping hole was real.